Mill.



R. A. GREENE.

MILL.

APPLICATION FILED MAR. 9. 1913.

1 ,290,976, I Patented J an. 14, 1919.

lNVENTOR BY ATTORNEY scribed, there is an UNITED STATES PATE T, oFEioE.

RICHARD A. GREENE, OF BROOKLYN, NEW YORK, ASSIGN OR TO JABEZ BURNS & SONS,

' A CORPORATION OF NEW YORK.

MILL.

Application filed March 9, 1918. Serial N 0. 221,373.

To all whom it may concern:

Be it known that 1,,RI0HARD A. GREENE, a citizen of the United States, and a resident of Brooklyn, in the county of Kings and State of New York, have invented certain new and useful Improvements in Mills, of which the following is a specification.

This invention relates to mills, and particularly to mills which are used for making nut butter, paste, etc., and the object of the invention is to improve upon the feeding arrangeinents heretofore used so as to produce greater freedom of feeding and with less loss of power than occurs in present mills.

By the improved construction herein deincrease of upward of 60% in the capacity of a given size of mill,

- as compared with constructions heretofore used. Nut mills of the present type consist of a horizontal feed screw which receives the nuts from a hopper at one end and delivers them through a spirally grooved casing to the rinders.

I ave discovered that a decided increase in output is obtained where the worm feed is combined with a casing having straight ribs running longitudinally of the shaft and separated somewhat more widely apart than has heretofore been the case with spiral ribs. The invention is shown herein as applied to the structure of mill shown in my application Serial No. 138,370, filed December 22, 1916, to which reference is made for a detailed description of the mill, only such outlines being shown herein, other than the features herein claimed, as will be suflicient for an understanding of the invention. Except as to the construction of the casing feed, it will be understood that the machine herein disclosed is closed insaid application.

In the accompanying drawing,

Figure l is an elevation of the mill, partly in section,

Fig. 2 is an en feed bushing,

Fig. .3 is an end view seen from the left of arged detail of a separable Fig. 2, and

Fig. 1 is a section on the line 4, 4: of Fig. 3.

1 represents the frame carrying the shaft 2 which carries a sleeve, not shown, on which is mounted a pulley 4 which is adapted to be connected and disconnected from the driving sleeve 3, and pinned to the driving sleeve through collar 6 is the shaft 2, so arranged Specification of Letters Patent.

'body when the shaft 2 the same as the one dis- Patented Jan. 14, 1919.

that when the pin 4 is removed the shaft 2 carrying the feed screw 8 and the conical end grinder 9 can be removed lengthwise from the machine without disturbing the drlving pulley or the other parts, as described in said application. 10 represents a salter mounted on the hopper 11 and driven through belt 12 so as to agitate the salt and feed a predetermined portion thereof into the feed chute 13 along with the nuts from the hopper 11. 14 is a hand wheel for regulating the pressure between the grinders 9 and 28 by controlling thetension of a spring through lever 15, and 16 is an operating handle for the clutch 5. The hopper chute 13 opens through the body 18 so as to allow the-nuts to fall directly by gravity on the feed screw 8. This is provided with spiral grooves and preferably forms a part of the shaft 2, and is contained within a grooved separable lining 20, see Fig. 2, held by set screw 21, and removable to the left from the and grinder 9 and cover 23 have been removed. The stationary grinder 28 is usually water jacketed as shown.

This lining preferably comprises four internal ribs 24 running in an axial direction and separated by straight longitudinal grooves 25, the inlet end of the lining having an opening at 26 whichregisters with the bottom of the chute 13 when the lining is properly positioned. I The exterior of the and easily fed the length of the lining to 100 and between the grinders 9 and 28. When the ribs wear out, as they ultimately will, or inspection is desired, it is only necessary to disconnect the pin 4; and pull the movable grinder and feed screw out laterally, in or- 105 der to remove the lining and supply anew one instead of obtaining an entirely new body as has heretofore been the practice when the spiral feeding grooves wear out.

By this invention the nuts are not broken 0 up in the feed, but the rotating worm and the longitudinal grooves rapidly and easily feed the nuts, and thereby I obtain an increase in capacity of about 60% without excessive heating, as compared with mills of the same size heretofore built. Spiral grooves in the casing and a rotating feed act to jam the nuts in the grooves and plug up themill, especially when running beyond normal capacity. A. mill embodying this invention not only has the increased normal capacity but will stand a considerable overload without jamming or plugging up,

. and without Overheating. These difliculties have heretofore necessitated frequent taking apart and cleaning in order to obtain any output at all, which are reduced by this invention. The renewable lining is moreover of decided advantage, because since wear increases with increasedoutput, new linings 7 can be quickly. and cheaply provided without necessitating a long shut down. Also, the machine can be maintained at better efiiciency because there will be no advantage in operating it with a worn lining, whereas with previous machines having an integral spiral feed in the body, the user would natcoiiperating' therewith, a horizontal shaft journaled 1n sald body carrying said movable grinder and having a feed screw within said body, a separable connection between, the feed screw and said driving means to permit withdrawal of the screw and movable grinder laterally of the stationary grinder, a separable lining having longitudinal feeding grooves surrounding said screw and coiiperating therewith, and a hopper opening through said body and lining to supply material to said screw.

3. A nut mill comprising a frame carrya movable grinder andfeed screw separably connected to said driving means so as to be removable laterally of said stationary grinder, and an internally grooved lining cooperating with said feed screw, whereby upon removal of the movable grinder and feed screw the lining can be removed from the frame laterally of the stationary grinder.

4. A. nut mill comprising a frame carry-' ing a stationary grinder and driving means,

a movable grinder and feed screw separably connected to said driving means so as to be removable laterally of said stationary grinder, and a lining having longitudinal internal grooves coiiperating with said feed screw, whereby upon removal of the movable grinder and feed screw the lining can be removed from the frame laterally of the stationary grinder.

Signed at New York city, in the, county of New York and State ofNew York, this 4th day of March, A. D. 1918.

' RICHARD A. GREENE.

Witnesses:

Snmnr CHABSON, Jos. L. Lnnnnnn.

mg a stationary grinder and driving means, 

